<?php
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

trait ArrowFunctions {

    public function test($param) {
        $test = fn($test) => $test + $param;
        $test = function($test) use ($param) {
            return $test + $param;
        }; // 01

        $test = fn&(array $test1, &...$test2, ...$test3, &$test4): ?int => count($test1) + count($test2) + count($test3) + count($test4) + $param;
        $test = function&(array $test1, &...$test2, ...$test3, &$test4) use ($param): ?int {
            return count($test1)+ count($test2) + count($test3) + count($test4) + $param;
        };
    }
}
